That Mystery Sender is always so helpful. S/he was looking for animal/insect postcards to add to the animal postcard category, and upon finding these ads, constructed the postcards. What a find!
The copy on the insect ads says, "No more pussyfooting around. These images show how dangerous unprotected sex can be", while the copy on the "dick head" ad says "Dick says 'Condoms are like a good bath. When you are inside, you don't want to get out."
One thing is certain - these ads would never be approved for publication in the US.